Hello there, I am dr.milan an infectious disease specialist answering your question. I suggest you to give up smoke because smoking it one of the cause of infertility. But i am not telling that you are infertile. You need to visit a gynecologist doctor for the pregnancy. you need to investigate for the cause why you couple have not baby till. All the history of your lifestyle, position of sex, menstrual period, calendar of having sex this all things need to asked than we can conclude something. So plz visit a good gynecologist. Hope i have given appropriate guidance to you. if you have any query you can consult me anytime. Give me star rating, helpful vote & thank you according to your satisfaction level. Thanking you.